[libcxx-commits] [PATCH] D68365: [libc++] Implement P1004R2 (constexpr std::vector)

[Stephan Bergmann via Phabricator via libcxx-commits]

sberg added a comment.

For a `-DLIBCXX_ENABLE_DEBUG_MODE=ON` build this now causes

  $ cat test.cc
  #define _LIBCPP_DEBUG 1
  #include <vector>
  static std::vector<int> v;
  int main() {
      v.push_back(0);
      int a = 0;
      for (auto i: v) a += i;
      return a;
  }
  
  $ clang++ -stdlib=libc++ -std=c++20 test.cc
  $ ./a.out
  ~/llvm/inst/bin/../include/c++/v1/__iterator/wrap_iter.h:87: assertion ::std::__libcpp_is_constant_evaluated() || (__get_const_db()->__dereferenceable(this)) failed: Attempted to dereference a non-dereferenceable iteratorAborted (core dumped)


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D68365